Re: Can I use 4 scr's as a ordinary rectifier bridge ?
- From: default <default@xxxxxxxxxxxxx>
- Date: Sun, 17 Feb 2008 09:32:51 -0500
On Sun, 17 Feb 2008 04:51:30 GMT, "Ray" <argyle1nospams@xxxxxxxxxxx>
wrote:
I want a full bridge, as I have a couple of 80 pound transformers with aDon't count them out entirely. If you want welding, battery charging
single output winding,
I guess I'l just buy the appropriate diodes.... I was just trying to
utilize some of the stuff I've been collecting, and the scr's seemed like a
good idea. I want to build a heavy duty general purpose power supply for
battery charging large batteries at my cabin, driving a winch, maybe light
welding. I have built a pwm controller for the output so I can use it with
both small and large generators, I see some 250 amp diodes on Ebay i'll
probably bid on
I learned something, I didnt know they made dides in a series
configuration...
Thanks for the input
Ray
etc. you can use them in a partial bridge - two regular diodes and
two SCR's for a pretty good adjustable power supply. Much more
efficient than a linear supply of the same amperage.
You just need a phase control for them - the basic unijunction and
phase shifting network to trigger them. I did something like that
awhile ago and was happy with the results. I used a pair of SCR's and
a center tapped transformer, but if I were to do it again I'd use a
pair of diodes and scr's.
The only downside was I needed a source to trigger the SCR's that was
more positive than the cathodes (positive output). If you used pulse
transformers that would be unnecessary. In my case I had a toroidal
transformer so just wound a 10 volt winding on top of the windings
already there. It just supplies a low current so doesn't need a
massive second transformer.
The upside is it is relatively bullet proof. Mine had no feedback so
didn't "regulate" just controlled the output. Mosfets in a welding
environment wouldn't be my first choice. SCR's TRIAC's or IGBT's
would.
--
.
- References:
- Can I use 4 scr's as a ordinary rectifier bridge ?
- From: Ray
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- Re: Can I use 4 scr's as a ordinary rectifier bridge ?
- From: Ray
- Re: Can I use 4 scr's as a ordinary rectifier bridge ?
- From: John Popelish
- Re: Can I use 4 scr's as a ordinary rectifier bridge ?
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- Can I use 4 scr's as a ordinary rectifier bridge ?
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